public class Test {
    public static void main(String[] args) {
        Integer a = 100;
        Integer b = 100;
        System.out.println(a == b);


        Integer i = 150;
        Integer j = 150;
        System.out.println(i == j);

    }

    public static void main3(String[] args) {
        Integer i = 100;
        int a = i;
        System.out.println(a);


        int a2 = i.intValue();
        System.out.println(a2);
    }


    public static void main1(String[] args) {
        int a = 10;
        Integer i = a;

        System.out.println(i);

        Integer i2 = Integer.valueOf(a);
        System.out.println(i2);

        Double d = Double.valueOf(a);
    }
}